MLA

Acton, Harold, 1904-1994. Chinese Embassy, London. Box 3, folder 195. 1940-1941. https://collections.library.yale.edu/catalog/17282078.

APA, 6th edition

Acton, Harold, 1904-1994. (["Box 3, folder 195"])(1940-1941)[Chinese Embassy, London]. https://collections.library.yale.edu/catalog/17282078.